Abstract: Process for the continuous dyeing of synthetic fibre materials from organic solvents, wherein the material, preheated to at least 100.degree. C., is impregnated with a halogenated hydrocarbon impregnating liquor containing dyestuff or optical brightener to give a liquor absorption of more than 100%, and is then passed through a vapor zone filled with halogenated hydrocarbon at a temperature above the boiling point of the halogenated hydrocarbon in such a manner that during passage of the material through this zone the liquor becomes concentrated on the material, whereby(a) the amount of solvent on the material is not increased by condensation of halogenated hydrocarbon vapor, and(b) more than 5% of liquor is present on the material when it emerges from the vapor zone, so that the material during its passage through this vapor zone never becomes dry.

Abstract: Aqueous dyestuff preparation of water-insoluble or sparingly water-soluble dyes are used for the preparation of printing pastes for printing textile material and for printing carriers for transfer printing. These preparations contain at least 10% by weight of water, 25 to 60% by weight of a finely dispersed water-insoluble or sparingly water-soluble dye, 0.1 to 5% by weight of at least one water-soluble aminoplast precondensate, 0.5 to 5% by weight of a non-ionic copolymer of ethylene oxide with a further olefin, oxide said copolymer containing at least 65% by weight of ethylene oxide and having a molecular weight higher than 12,000, as well as, if desired or necessary, further nonionic ingredients.

Abstract: 2-Phenyl-5-benzimidazol-2'-yl-furanes of the formula ##STR1## in which R.sub.1 to R.sub.6 are as defined in the specification, n is the number 0 or 1 and A.crclbar. is a colorless anion equivalent to the cation of the fluorescent brightener, their preparation as well as their use for optically brightening organic materials are disclosed.

Abstract: A method of marking an ophthalmic lens of organic material and the lens so marked. A marking substance containing an optical brightener which is a derivative of benzoxazolyls stilbenes, or benzotriazoles is mixed with a suitable binder and solvent and applied to a surface of the lens to be marked by thermal transfer from a transfer support. The marking substance is shaped to the desired configuration either when applied to the transfer support or by a mask defining the mark or indicia to be applied. Heat is applied to the marking substance and the lens which sublimes the optical brightener which then penetrates into the organic material of the lens to be anchored therein. The resultant indicia or mark provides a permanent marking of the lens and is only visible in ultra-violet light.

Abstract: The stability of organic substrates having an absorption maximum between 300 and 800 nm in wavelength can be improved by at least one compound represented by the formula (I); ##STR1## wherein M represents Cu, Co, Ni, Pd or Pt; X.sub.1, X.sub.2, X.sub.3 and X.sub.4 eachrepresents an oxygen or sulfur atom, R.sub.1 and R.sub.2 each represents an alkyl, an aryl, a cycloalkyl, an oxocyclalkyl or a heterocyclic group attached to the carbon atom on the chelate ring directly or through a divalent connecting group, R.sub.3 represents a hydrogen atom, an alkyl, an aryl, a cycloalkyl, an oxocycloalkyl or a heterocyclic group attached to the carbon atom on the chelate ring directly or through a connecting group whereby R.sub.1, R.sub.2 and R.sub.3 may be the same or different and R.sub.1 and R.sub.3 or R.sub.2 and R.sub.3 may combine with each other to form a 5-, 6- or 7- member ring structure.

Abstract: Benzodifuranes of the formula ##STR1## wherein R represents hydrogen, alkyl or halogen, each of R.sub.1, R.sub.2 and R.sub.3 represents hydrogen or different non-chromophoric substituents, with the proviso that at least one of the symbols R, R.sub.1, R.sub.2 or R.sub.3 does not represent hydrogen, processes for their production and the use thereof for whitening organic material of high molecular weight, especially polyester, polyvinyl chloride or polystyrene.

Abstract: Compounds of the general formula R--CH.dbd.CH--W--CH.dbd.CH--R.sup.1 are described in which R and R.sup.1 are independently phenyl, diphenyl, naphthyl, indyl, tetrahydronaphthyl or acenaphthenyl and W is divalent phenyl, diphenyl, naphthyl, tetrahydronaphthyl or acenaphthenyl group, which groups may be substituted, the compounds containing at least one non-aromatic ring. Such compounds are useful as optical whitening agents, for example in textile material or paper.

Abstract: Benzoxazolyl-phenyl-stilbenes of the formula ##STR1## in which X is a carboxylic acid group or an ester or amide thereof, a phenyl sulphonate group or a sulphonamide group, a cyano group or alkylsulphonyl and the ring A can be substituted by alkyl having 1 to 4 C atoms, phenyl, chlorine, alkoxy having 1 to 4 C atoms, phenoxy, cyano, alkylsulphonyl having 1 to 4 C atoms, phenylsulphonyl or alkoxycarbonyl having 2 to 6 C atoms, a process for their manufacture as well as their use for the optical brightening are disclosed.